Vacuum device for internal-combustion engines



July 2L 1925. 1,546,560

c. c. BRADBURY VACUUM DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Nov. 3, 1921 P tented July 121, 1,925; I 7

UNITEDsir-eras PA ENT mm.

CLIFFORD QIIBBADBURY, OI OAK PABK, ILLINOIS, ASSIGNOR, IBY MESNE ASSIGN- "MENTS TO CURTIS B. CAMP, TRUSTEE, OF OAK PARK, ILLINOIS.

" vacumli 'pnvrcn roa mrnnnan-oonnusrron ENGINES.

Application filed itovember a, 1921. Serial No. 512,517,

ToY aZZ whom it mag concerns Be it known that I, 'C IrroRw-O. 'BRAD- eunn'a'citizen of the United States, and

resident of OakPark, in the county of Cook 6 and State of Illinois, have invented a cerconcise, and exact'description, reference bel 10 ing tain new and useful Improvement-in Vac-, uum- Devices for Internal-GombustiontEngines,of which the following is a-full, clear,

ad to the accompanying. drawings, j forming a part of this specification.

My invention relates to apparatus for use A in the water circulating system of an auto- 1 mobile .to' enhance the suction to provide an 1 adequate, suction for the rationof a vacuum tank for lifting fuel rom the low level gravity. p The invention comprises a Venturi. tube 11ocated between the base :of the radiator and f-fthe intake ofltheawater pump, the part fi'containing the 'Venturi tubebeing preferably provided with an automatic restricting fade uate suction. f

*g va lve for-assisting in the maintenance of V y-invention is illustrated in the accom:

panying drawings, in which wFigure 1 is a cross section of the Venturi tube and its associated parts; and

Figure2'is a layout of the power plant Venturi 'tube which is far in excess of the suction which causes the flow through the tube. ,'-I take advantage of this princ1ple, by. pfrovidinga casing 2 internally formed to a enturi sha e'with its throat at 3 connected by a small p ssageway through the couplin 4 with the suction line 5, there being a chec valve 6 included in the coupling permitting fiolw in the direction toward the enturi tube on y.

' 5 The intake to the casing '2 is rovided ateach end to fit with-a valve ,7 Id against a seat8 means of a spring valve beinlg gulded by spiders 10 to hold it centrally within the passage. 4 'e casing 2 is preferably formed into that the casing may be'readily inserted in r the linebetween the radiator and the ump 'in existin ;.types of automobiles without elaborate c ange] j for; delivery 'to' the. carburetor rubber hosell, so

In Figure 2, the casing is shown at2,

where it connects between the radiator 13 and the circulating pump 14:. Thesuction line 5 leading from the connection 4 on the casing2 extends to the top of a supply tank 15 which delivers fuel through a d1soharge pipe 16 to a carbureter 17 The fuel is sup-, plied to the tank 15 from a low level'source 18, the tank 15 being of any well-known type used for supplying fuel to carbureters'. '15

i The 'Water in the circulating system becomes very roily with particles'fof rust; and in order to prevent these articles from getting into the pipe Band 0 ogging it during periods of inoperatio'n of the engine, the check valve 6 is provided, and the casing 2 is preferably installed with the nipple 4 extending in an upwardl I shown, in order that the se imentjfrom the water will'not clog the opening'through the throat of the Venturi-tube or the passage between that opening and the valve ;6.

direction, as

The apparatus just describedv may be' modified by the omission of either the valve .7 or the Venturi tube, or both. If the valve is omitted, an adequate suction will be obtained only at" higher engine speed than if the valve is present; v, omitted, the suction obtainable from the passage will be less and the engine speed will have to be greater to secure ade uate suction. If both the Venturi tube "an the valve are omitted, the degree of .suction obtainable in the casing 2 will depend upon the type of radiator and the consequent resistance to the flow of water through the radiator. In this case,-a still higher engine speed is required in' order to obtain the necessary degree of suction. e 'I have found it preferable to make the opening between the coupling 4 and the throat of the Venturi tube very small so that the air will be drawn in very slowly, because, if drawn in too rapidly, air, in the first place, so lightens the water that the suction eliiciency of the centrifugal pump is diminished, and, in the second place, the air, upon arrival in the engine acket, if allowed to enter in too large quantities, expands through heat and displaces an ob-' ectionable amount of water.

While I have shown and described my 1nventioni with respect to certain details of construction, it is. to be understood that cer- If the Venturi tube is inclusion between a radiator and the intake ofa water circulating pump, an automati-c cally operating valve within .the device for restricting the 'flow of liquid therethrough to create a predetermined suction within the device, and aconnection extending from the device to apparatus to receive suction therefrom.

2; Infa device of the class described for inclusion between a radiator and the intake of 'a water circulating pump, an'automati cally varying valve within the device for restricting the flow of water therethrough to create a predetermined suction within the device, a Venturi tube included in the device, 20 between the valve and the water circulating pump, and a connection from a ,point'near the throat of the Venturi tube to apparatus to receive suction therefrom.

In witness whereof, I hereunto subscribe 25 my name this 1st dayof November, 1921.

, CLIFFORD C. BRADBURY. Witnesses: V

EDNA V. GUSTAFSON, v EMILE J. BGURGEOIS. 

